ARMSystemLinkage.hpp

/*******************************************************************************
 * Copyright IBM Corp. and others 2000
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution
 * and is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception [1] and GNU General Public
 * License, version 2 with the OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 *******************************************************************************/

#ifndef ARM_SYSTEMLINKAGE_INCL
#define ARM_SYSTEMLINKAGE_INCL

#include "codegen/Linkage.hpp"

#include "infra/Assert.hpp"

namespace TR { class AutomaticSymbol; }
namespace TR { class CodeGenerator; }
namespace TR { class Instruction; }
namespace TR { class MemoryReference; }
namespace TR { class Node; }
namespace TR { class Register; }
namespace TR { class RegisterDependencyConditions; }
namespace TR { class ResolvedMethodSymbol; }

namespace TR {

class ARMSystemLinkage : public TR::Linkage
   {
   static TR::ARMLinkageProperties properties;

   public:

   ARMSystemLinkage(TR::CodeGenerator *cg);

   virtual uint32_t getRightToLeft();
   virtual void mapStack(TR::ResolvedMethodSymbol *method);
   virtual void mapSingleAutomatic(TR::AutomaticSymbol *p, uint32_t &stackIndex);
   virtual void initARMRealRegisterLinkage();

   virtual TR::MemoryReference *getOutgoingArgumentMemRef(int32_t               totalParmAreaSize,
                                                            int32_t               argOffset,
                                                            TR::Register          *argReg,
                                                            TR::InstOpCode::Mnemonic         opCode,
                                                            TR::ARMMemoryArgument &memArg);

   virtual TR::ARMLinkageProperties& getProperties();

   virtual void createPrologue(TR::Instruction *cursor);
   virtual void createEpilogue(TR::Instruction *cursor);

   virtual int32_t buildArgs(TR::Node                            *callNode,
                             TR::RegisterDependencyConditions *dependencies,
                             TR::Register*                       &vftReg,
                             bool                                isJNI);

   virtual TR::Register *buildDirectDispatch(TR::Node *callNode);
   virtual TR::Register *buildIndirectDispatch(TR::Node *callNode);

   /**
    * @brief Provides the entry point in a method to use when that method is invoked
    *        from a method compiled with the same linkage.
    *
    * @details
    *    When asked on the method currently being compiled, this API will return 0 if
    *    asked before code memory has been allocated.
    *
    *    The compiled method entry point may be the same as the interpreter entry point.
    *
    * @return The entry point for compiled methods to use; 0 if the entry point is unknown
    */
   virtual intptr_t entryPointFromCompiledMethod();

   /**
    * @brief Provides the entry point in a method to use when that method is invoked
    *        from an interpreter using the same linkage.
    *
    * @details
    *    When asked on the method currently being compiled, this API will return 0 if
    *    asked before code memory has been allocated.
    *
    *    The compiled method entry point may be the same as the interpreter entry point.
    *
    * @return The entry point for interpreted methods to use; 0 if the entry point is unknown
    */
   virtual intptr_t entryPointFromInterpretedMethod();

   };

}

#endif